For example, you might want to have one set of options in a directory mainly used for programming:
set number lisp autoindent sw=4 terse set tags=/usr/lib/tags
and another set of options in a directory used for text editing:
set wrapmargin=15 ignorecase
Note that you can set certain options in the .exrc
file in your home directory and unset them (for example,
set wrapmargin=0 noignorecase)
in a local directory.
NOTE: In System V, Release 3.2 and later, vi doesn't read &.exrc files in the current directory unless you first set the
exrcoption in your home directory's .exrc file:set exrc
This mechanism makes it harder for other people to place, in your working directory, an .exrc file whose commands might jeopardize the security of your system.
You can also define alternate vi environments by saving option
settings in a file other than .exrc and reading in that file
:so command. For example:
Local .exrc files are also useful for definingand . When we write a book or manual, we save all abbreviations to be used in that book in an .exrc file in the directory in which the book is being created.
- from O'Reilly & Associates' Learning the vi Editor, Chapter 7